English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

The Ni-Mn-based shape memory alloys as a promising candidate of elastocaloricmaterial has been reported in many literatures, especially on bulk samples. Theas-spun ribbon, which has a larger surface area and is more efficient for heattransfer, is rarely studied and hence of importance. In the present work, wesucceeded in producing very long as-spun Ni-Fe-Mn-(Al, In) ribbons, with around300 mm in length. The microstructure and mechanical properties of these as-spunribbons were thoroughly investigated by scanning electron microscopy / electronbackscattered diffraction (SEM/EBSD), nanoindentation and 3-points bendingexperiments. Through SEM/EBSD analyses, the microstructure and texture of theas-spun ribbons were studied. A gradient in microstructure exists along thethickness direction (TD) of the ribbon, which is induced by the temperaturegradient during fast rate solidification, resulting in fine equiaxed grainsalong the surface contacted with the rotating wheel in melt spinning processand elongated grains, respectively. Both equiaxed and elongated grains possessa strong {001} fiber texture (<001>//TD). Nanoindentation analyses show littlevariation of hardness between the two different microstructures. The ductilityindex of both Ni-Fe-Mn-Al and Ni-Fe-Mn-In ribbons are within the range ofintermetallic materials. The substitution of In by Al allows to increase veryslightly the ductility index, which can reach 0.75. The fine equiaxed grainsshow better tensile resistance than the elongated grains in 3-points bendingtest. The substitution of In by Al improves the maximum bending strain by afactor of 3. The maximum strain for Ni-Fe-Mn-Al as-spun ribbons can reach 3 %before fracture. Fractography shows that the intergranular fracture is the maindamage mechanism in these as-spun ribbons.

Microstructure and correlated mechanical properties study of Ni-(Fe, Co)-Mn-(Al, In) as-spun ribbons